I was going to replace mine at about 105K miles. It was a mistake. The original was clean as a whistle and the spring still strong.
In removing the old one, I broke the plastic tube coming from the firewall and fixed it with some epoxy and a pipe coupling.
The replacement, which I took back, did not fit since the hose connections were a little off dimensionally on the tee. The hoses there are real tight, so a slight mis-alignment makes connecting one or more of them impossible.
